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Java 为什么getAnnotation不接受类<；？扩展注释>；

java generics

Java 为什么getAnnotation不接受类<；？扩展注释>；,java,generics,annotations,javac,Java,Generics,Annotations,Javac,为什么follow行在Java中产生编译错误？或者如何编写正确的泛型语法 Class<? extends Annotation> annotation = annotations[i]; Class<? extends Annotation> anno = javaClass.getAnnotation(annotation); ClassgetAnnotation返回注释本身，而不是注释的类。我想你可以用： Class<? extends Annotation&

为什么follow行在Java中产生编译错误？或者如何编写正确的泛型语法

Class<? extends Annotation> annotation = annotations[i];
Class<? extends Annotation> anno = javaClass.getAnnotation(annotation);

Class
getAnnotation
返回注释本身，而不是注释的类。我想你可以用：


Class<? extends Annotation> annotationClass = annotations[i];
Annotation annotation = javaClass.getAnnotation(annotationClass);



类

Type mismatch: cannot convert from capture#5-of ? extends Annotation to Class<? extends Annotation>



incompatible types
    Class<? extends Annotation> anno = javaClass.getAnnotation(annotation);
                                                              ^
 required: Class<? extends Annotation>
 found:    CAP#1
 where CAP#1 is a fresh type-variable:
   CAP#1 extends Annotation from capture of ? extends Annotation



Class<? extends Annotation> annotationClass = annotations[i];
Annotation annotation = javaClass.getAnnotation(annotationClass);